In J. R. R. Tolkien's legendarium, the Elves or Quendi are a sundered (divided) people. They awoke at Cuiviénen on the continent of Middle-earth, where they were divided into three tribes: Minyar (the Firsts), Tatyar (the Seconds) and Nelyar (the Thirds). After some time, they were summoned by Oromë to live with the Valar in Valinor, on Aman. That summoning and the Great Journey that followed split the Elves into two main groups (and many minor ones), which were never fully reunited.
Tolkien stated that the stories were made to create a world for his elvish languages, not the reverse. The Tolkien scholar Tom Shippey writes that The Silmarillion derived from the linguistic relationship between the two languages, Quenya and Sindarin, of the divided Elves. The Tolkien scholar Verlyn Flieger states that Tolkien used the Indo-European type of proto-language as his model. In her view, the sundering of the Elves reflects the progressive decline and fall in Middle-earth from its initial perfection; the highest Elves are those who deviated least from that state, meaning that in Tolkien's scheme, ancestry is a guide to character.